ASoC: SOF: Intel: hda: retrieve SoundWire eml_lock and pass pointer

Use new helper and interface to make sure the HDaudio and SoundWire
parts use the same mutex when accessing shared registers.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230515071042.2038-9-yung-chuan.liao@linux.intel.comSigned-off-by: Vinod Koul <vkoul@kernel.org>

sound/soc/sof/intel/hda.c

@@ -175,6 +175,15 @@ static int hda_sdw_probe(struct snd_sof_dev *sdev)
 		res.alh_base = hdev->desc->sdw_alh_base;
 		res.ext = false;
 	} else {
+		/*
+		 * retrieve eml_lock needed to protect shared registers
+		 * in the HDaudio multi-link areas
+		 */
+		res.eml_lock = hdac_bus_eml_get_mutex(sof_to_bus(sdev), true,
+						      AZX_REG_ML_LEPTR_ID_SDW);
+		if (!res.eml_lock)
+			return -ENODEV;
+
 		res.mmio_base = sdev->bar[HDA_DSP_HDA_BAR];
 		/*
 		 * the SHIM and SoundWire register offsets are link-specific